U0140 on the 2014 Jeep Wrangler
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 18-077-15 | 2022-08-08. Service bulletin. Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) set in the PCM memory: ? U0140 - Lost Communication With Body Control Module. Customers may also describe one or more of the following conditions: ? Less than desired shift points during Wide Open Throttle (WOT) operation. ? Perceived misfire under normal acceleration. Software update is also available for customers with vehicles equipped with Manual Transmissions (DEH) to disable the starter protection feature for Rock Crawling. |
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| 18-077-15 | 2022-07-25. Service bulletin. Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) set in the PCM memory: ? U0140 - Lost Communication With Body Control Module. Customers may also describe one or more of the following conditions: ? Less than desired shift points during Wide Open Throttle (WOT) operation. ? Perceived misfire under normal acceleration. Software update is also available for customers with vehicles equipped with Manual Transmissions (DEH) to disable the starter protection feature for Rock Crawling. |
| 18-077-15 | 2018-12-17. Service bulletin. Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) set in the PCM memory: ? U0140 - Lost Communication With Body Control Module. Customers may also describe one or more of the following conditions: ? Less than desired shift points during Wide Open Throttle (WOT) operation. ? Perceived misfire under normal acceleration. Software update is also available for customers with vehicles equipped with Manual Transmissions (DEH) to disable the starter protection feature for Rock Crawling. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.